Having said that, you should always try to avoid swimming in waters with jellyfish where possible. The suit provides an extra layer of protection but that doesn't mean it's 100% full proof when it comes to preventing jellyfish stings.
People Also Ask
Why is it best to go commando under your wetsuit? Well, neoprene wetsuits work as insulators trapping your body heat inside while acting as a barrier to the cold outside. Therefore, putting anything between you and your wetsuit can reduce the wetsuits effectiveness as an insulator.